Hi, Am Freitag, den 05.02.2016, 09:22 +0200 schrieb Roman Cheplyaka:
On 02/05/2016 01:31 AM, Edward Z. Yang wrote:
I'm not really sure how you would change the type of 'id' based on a language pragma.
How do people feel about a cosmetic fix, where we introduce a new pragma, {-# LANGUAGE ShowLevity #-} which controls the display of levity arguments/TYPE. It's off by default but gets turned on by some extensions like MagicHash (i.e. we only show levity if you have enabled extensions where the distinction matters).
Yes, I am surprised this isn't the way it's been done. The levity arguments should totally be hidden unless requested explicitly.
I'd only expect this to be a ghc flag (-fshow-levity), not a language pragma, since it should only affect the way types are /shown/.
shouldn’t this already happen, based on -fprint-explicit-kinds? At least I would have expected this. So we probably either want to make sure that -fno-print-explicit-kinds also prevents forall’ed kind variables, or add a new flag of that (heh) kind. Greetings, Joachim -- Joachim “nomeata” Breitner mail@joachim-breitner.de • http://www.joachim-breitner.de/ Jabber: nomeata@joachim-breitner.de • GPG-Key: 0xF0FBF51F Debian Developer: nomeata@debian.org